AL100200-A 100 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=200 mm; NA=0.23 AR 350-700nm

The AL100200-A is a high-precision aspheric lens, manufactured by Thorlabs, boasting a diameter of 100 mm and a focal length of 200 mm. This lens is crafted from n-BK7 Schott glass, a material renowned for its excellent optical properties and versatility. The lens's design includes a high-quality anti-reflective coating, which spans the spectrum of 350-700 nm, thereby minimizing surface reflections and enhancing overall transmission.

The lens's geometry is intricately designed, featuring a center thickness of 19 mm and an edge thickness of 6.5 mm. The aspheric design, characterized by the conic constant (k1) of -1, helps correct spherical aberration, a common issue in traditional spherical lenses. The lens's front surface is defined by the radii of curvature r1 and r2, which are 102.24 mm and 0 mm, respectively. The lens's surface irregularities are minimized through Computer Numerical Control (CNC) polishing, ensuring superior optical quality.

The lens's numerical aperture (NA) is 0.23, indicating a wide acceptance angle and high light-gathering capability. The lens's shape is circular, and it features a high-quality anti-reflective coating on both the front and back surfaces. This coating, denoted as 'tho a bbar', is designed to reduce surface reflections and increase transmission, thereby enhancing the lens's overall performance.